This can be particularly seen in Sri Rudram.

नमो - बभ्लुशाय विव्याधिनेऽन्नानां पतये - नमः

नमो - भवस्य हेत्यै जगतां पतये - नमः

नमो - रुद्रायाततायिने क्षेत्राणां पतये - नमः

नमः - सूतायाहन्त्याय वनानां पतये - नमः

There is Namaskara both at the beginning and end.

Why is this so?

Rudra has got both aspects: protective and destructive.

He protects everything.

But when pralaya comes he has to destroy the world he has protected thus far.

Considering this dual character of Rudra, he is offered Namaskara twice:

1. To get his protection.
2. To divert his destructive power towards our enemies, diseases, etc.

Knowledge Bank

The Oneness of God

A verse from Tirumanthiram by Tirumulaṛ highlights the oneness of God, stating that there is only one God for the entire world, who is also the soul or essence of the world. The name 'Shiva,' refers to this one God, and it signifies Truth, Infinite Wisdom, and unbounded Grace. It emphasizes the unity and universal nature of the divine.

Who was Adhyapayana?

After he divided the Veda into four parts, Sage Vyasa had given the charge of Atharva Veda to his disciple Sumantu. Adhyapayana was Sumantu's disciple. He further divided Atharva Veda into two; gave one part to Utatthya and the other to Vedadarshana.